Contains hydrolyzed milk protein and L-tryptophan to help manage cats exhibiting fearful behaviors in stressful environments and social situations.

Founded by a veterinarian, Royal Canin has over 40 years experience in Health Nutrition. Our work with veterinarians, pet nutritionists, breeders and cat professionals from around the world has provided us with knowledge about the specific nutritional requirements of cats. This knowledge has allowed us to formulate the precise diet for your cat's special needs.

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Discover our tool that calculates the daily portion for your pet. Fill in your pet's information and you will get their daily feeding recommendation. In case of weight issues, do not hesitate to consult your vet to adapt this portion. Note that this feeding recommendation is more precise than the feeding table, therefore the values may slightly differ.


Chicken by-product meal, corn gluten meal, brewers rice, wheat, corn, pea fiber, natural flavors, dried chicory root, wheat gluten, fish oil, chicken fat, salt, calcium sulfate, sodium bisulfate, potassium chloride, sodium pyrophosphate, DL-methionine, vegetable oil, psyllium seed husk, monocalcium phosphate, fructooligosaccharides, choline chloride, vitamins [DL-alpha tocopherol acetate (source of vitamin E), niacin supplement, D-calcium pantothenate, biotin, pyridoxine hydrochloride (vitamin B6), riboflavin supplement, thiamine mononitrate (vitamin B1), vitamin A acetate, folic acid, vitamin B12 supplement, vitamin D3 supplement], taurine, L-tryptophan, dried hydrolyzed casein, trace minerals [zinc proteinate, zinc oxide, manganese proteinate, ferrous sulfate, manganous oxide, copper sulfate, calcium iodate, sodium selenite, copper proteinate], L-carnitine, marigold extract (Tagetes erecta L.), rosemary extract, preserved with mixed tocopherols and citric acid.

Calorie Content

This diet contains 3350 kilocalories of metabolizable energy (ME) per kilogram or 322 kilocalories ME per cup on an as fed basis (calculated).

Nutrient Amount
Crude Protein (min)32.0%
Crude Fat (min)9.0%
Crude Fiber (max)6.8%
Moisture (max)8.0%
Tryptophan (min)0.31%
Calcium (max)1.4%
Phosphorus (max)1.3%
Magnesium (max)0.08%.

Dry Feeding

Cat Weight Low Activity Medium Activity High Activity
4.4 lb (2 kg) 1/4 cup (28 g) 3/8 cup (35 g) 1/2 cup (43 g)
6.6 lb (3 kg) 3/8 cup (38 g) 1/2 cup (47 g) 5/8 cup (57 g)
8.8 lb (4 kg) 1/2 cup (46 g) 5/8 cup (58 g) 3/4 cup (70 g)
11 lb (5 kg) 5/8 cup (54 g) 3/4 cup (68 g) 7/8 cup (82 g)
13.2 lb (6 kg) 5/8 cup (62 g) 7/8 cup (78 g) 1 cup (93 g)

Mixed Feeding

Cat Weight Cans / Day Low Activity Medium Activity High Activity
4.4 lb (2 kg) 1/2 1/4 cup (19 g) 1/4 cup (27 g) 3/8 cup (34 g)
6.6 lb (3 kg) 1 1/4 cup (19 g) 3/8 cup (30 g) 3/8 cup (40 g)
8.8 lb (4 kg) 1 1/4 cup (27 g) 3/8 cup (42 g) 5/8 cup (54 g)
11 lb (5 kg) 1 3/8 cup (35 g) 1/2 cup (53 g) 3/4 cup (68 g)
13.2 lb (6 kg) 1 1/2 cup (43 g) 5/8 cup (64 g) 7/8 cup (80 g)
Urinary SO + Calm Dry Cat Food

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Customer reviews

06 Jun 2022

Very disappointed

My cats have been on Royal Canin ‘Calm’ for about 7 years and it has been amazing! I was a bit nervous to hear that weren’t making it anymore and had changed the formula to ‘Urinary SO + Calm’ but we bought a big bag and gave it a try. It has been a few weeks and the behaviour of both my cats has changed dramatically, one only coming out from under the bed to eat and use the washroom, the issue we had before we found ‘Calm.’ Our issue is not environmental and over the years we had friend many different things to calm her but only had success with the original brand of this food. Not sure where to go from here, very sad to say the least.
31 May 2022

Cats love this food

My cats love this food and are always wanting more. I don't know that the calming ingredients are enough for my cat, but they do seem to help a bit. I still use a diffuser in addition to the food, to help keep my boy less stressed. I would prefer a grain free formula, however I have not found any urinary formulations that do not contain grains. Prior to my cat's urinary issues, I had been feeding what I felt was a better quality food for about half of the price. Overall, my cats like the food and I have peace of mind that he is less likely to have urinary issues while eating this food.
31 May 2022

Wonderful product!

My cat had to have emergency surgery several years back, including stating nearly a week at the vet/emergency vet to recover. I opted to switch his diet afterwards to help avoid further complications. The vet had a sample of the urinary+calming food, and my cat loved it and has been on it ever since. He made a full recovery and has been healthy and happy since then! Sometimes, he even gets mail!
02 Nov 2021


This stuff was great and really helped my two cats not fight all the time. One of the cats has kidney issues and has to be on the prescription urinary food. This stuff was a life-saver and we miss it.
01 Oct 2021

Everybody Loves This One !

The cats all love this formulation. I buy it for my adukts, but my kittens eat it when they can, too.
11 Apr 2021


Started using this food after my cat blocked (urinary). I had recently gotten a crazy puppy that was causing some stress for the cat. No more Issues. Dog is still crazy. Cat would not eat Science Diet food.
carhy H
26 Mar 2021

He’s to find

My cat has been on this for over a year and has not has a urinary tract infection since he has been on it. However my source has not been able to get this for several months. Can you tell me why?
17 Feb 2021

Gives my kitty an upset stomach

Worked ok in the beginning but there was always something off compared to the other urinary foods. Now I am 100% sure I isolated my cat's upset stomachs/diarrhea to this food! Second bag, and definitely if I give him this food not combined with anything else it's a disaster. The calmness does nothing. Stick to the original Urinary or Moderate Calorie, also have problems since they changed the recipe, but still better than this garbage.
CatMomof 3
21 Dec 2020

20 Dec 2020

Excellent food - but so hard to find

My cat would kill for this food. He absolutely tucks into it every day. He had a life-threatening run-in with crystals about 2.5 years ago and not a so single problem since. Sadly the vet I was using to get this from has moved out of area and I cannot find a single place online that carries it. I've asked another local vet and they say they can't get it. Not sure what I'm going to do about that.